“…General Methods: All air‐sensitive reactions were carried out under an atmosphere of ultra‐high purity argon. 4,4‐Difluoro‐2‐iodo‐1,3,5,7‐tetramethyl‐8‐phenyl‐4‐bora‐3a,4a‐diaza‐s‐indacene ( 5 ), 4,4‐difluoro‐2,6‐diiodo‐1,3,5,7‐tetramethyl‐8‐phenyl‐4‐bora‐3a,4a‐diaza‐s‐indacene, 4,4‐difluoro‐2‐iodo‐1,3,5,7‐tetramethyl‐8‐phenyl‐6‐(phenylethynyl)‐4‐bora‐3a,4a‐diaza‐s‐indacene ( 8 ), 5‐formyl‐1,1,3,3‐tetramethylisoindolin‐2‐yloxyl ( 11 ),, and 5‐ethynyl‐1,1,3,3‐tetramethylisoindolin‐2‐yloxyl ( 6 ) were prepared by using established procedures. All other reagents were purchased from commercial suppliers and used without further purification.…”